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The important role of ferrite magnetic core in design of EMI filter
Mar 12, 2019

The important role of ferrite magnetic core in design of EMI filter

Its main advantages below:

1. It is very convenient and easy to use, and it can be directly placed on the cable that needs to be filtered.

2. Unlike other filtering methods, grounding is required, so there is no special requirement for structural design and circuit board design.

3. As a common mode choke to use, it will not cause signal distortion, which has a great effect on the wires that transmit high frequency signals.

The biggest difference between electromagnetic interference suppression ferrite and ordinary ferrite is that it has a large loss. The inductor made of this ferrite as a magnetic core has a characteristic closer to the resistance, and it is a resistance value increasing with frequency. With the increased resistance, when the high frequency signal passes through the ferrite, the electromagnetic energy is dissipated as heat.